H31-211 Online Practice Questions and Answers

The following description of the advantages of optical fiber as a transmission medium, what are the correct ones? (multiple choice)

A. Not susceptible to interference from electromagnetic signals

B. High transmission rate

C. The transmission distance is infinitely long

D. Expensive

The network administrator is removing multiple VLANs from the switch. When the administrator enters the

undo vlan 1 command, he receives an error message.

What is the cause of the error message?

A. VLAN can only be deleted by the user who created it

B. VLAN 1 can be deleted only after the role of VLAN 1 is assigned to other VLANs.

C. The command was not entered correctly, resulting in a syntax error

D. VLAN 1 is the default management VLAN and cannot be deleted.

A permanent virtual circuit is to provide a fixed virtual circuit to the user. Once the circuit is established, the link water is valid, unless the administrator manually deletes it. PVC is used for frequent and stable traffic transmission between the two ends.

A. True

B. False

Which of the following storage media are commonly used by Huawei routers? (multiple choice)

A. SDRAM

B. NVRAM

C. Flash

D. Hard Disk

E. CF Card

The SMTP protocol is transmitted based on TCP. What is the port number?

A. 21

B. 23

C. 25

D. 53

When a frame is forwarded, it is determined whether the Ethernet frame can be forwarded from the port by checking whether the VLAN tag carried in the Ethernet packet is the port ().

A. Allow to be forwarded from the port.

B. Allowed labels

C. Default PVID

D. MAC address correspondence

E. STP disable status

The routing protocol defines the communication rules between routers.

A. True

B. False

As long as the static route is manually configured, will this static route always exist in the routing table?

A. True

B. False

Which of the following is the correct description of the mesh structure? (multiple choice)

A. In a fully connected mesh network, n(n-1)/2 physical links are required to connect n devices.

B. In a fully connected mesh network, if one link fails, it will not affect the entire system.

C. Fully connected network is more robust

D. The cost of a fully connected network is low and easy to implement

During the PPP link establishment phase, the value of the parameter in the Configure-Request sent by the peer is not recognized locally. Which message should the local end respond to?

A. Configure-Nak

B. Configure-Reject

C. Configure-Ack

D. Not right